Pen box



1. Pen box

1.1 is a perspective view of a pen box showing the new design;

1.2 is a left side view thereof;

1.3 is right side view thereof;

1.4 is a front view thereof;

1.5 is a rear view thereof;

1.6 is a top view thereof;

1.7 is a bottom view thereof; and

1.8 is another perspective view thereof, shown in an open configuration.

CLAIM The ornamental design for a pen box, as shown and described.